How often are you watering those?You cannot overwater a well draining medium. The problems come in when you water too often, keeping the medium saturated and suffocating the roots.
How often are you watering those?
Quirk, why do you go direct to full sized pot rather than progressing through different sizes? Your method - moist soil and strictly hands off for ten days - is workable but don’t you miss being able to monitor the root growth by being able to check it during transplant?